Kenwood R-2000 Service Manual

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R-2000ADJUSTMENTAdjusting Receiver SectionMeasurement AdjustmentItem Condition Test Ter- Specificationsequipment Unit minalUnit Part Methoci1.RBvoltageDCVMRXTP4RXVR7 2.3V2.BFO1)MODE:USBFrequencyRXTP3RXT19456,500Hz±50Hz(Coarse counteradjustment)3. Sensitivity1)f: 14,525.0 kHz·ssGRear ANTPLLT1,MAX(RF,IFamp) MODE:USBAFVMpanel T2. T4,AGC: FAST Oscillo- T5SSGoutput: 0 dBμ scope EXTSP RXT5 toMAXS/N:10dBor moreAF dummyload T16, T18 Perform adjustment inthe following order:T5, T6, T7, T8, T7, T6,T5, T9, T10, T11, T12,T11, T10, T11, T12,T11, T10, T13, T14,T15, T16, T18.4. 1st MIX 1) f: 187 .3 kHzAFVMRear EXTSPRXVR1MIN. HeterodyneBALANCE MODE: USB Oscillo- panelTUNINGSTEP:SLOW scopeAF dummyload5.BFO1)f: 14,525.0 kHzSPRXT19 Alternate MODE bet-{Fine ad- MODE: USB, thenLSBween USB and LSB andjustment) adjustforequal noisetone.(Equal highs and lows)2)SSGoutput:SSGRear ANT Receive the 14.525 Within 1.5 dB14.525 MHz panel MHz generator signal inOdBμ USB mode, tunefor1kHz beat frequency, andAF output at0.63V/8!2.AFVMEXT SPSettoLSB mode, adjustOscillo-for1 kHz beat and mea-scope sure the AF output diffe-AF dummy rence.load6.FMsensitiv-1)f: 14,525.0 kHzSSG Rear ANTRXT21MAXS/N: 20 dB or moreity MODE:FMAFVMpanel EXTSP(FM IFamp)SSGoutput: 6 dBμ Oscillo-(MODE: 1 kHz scopeDEV: 5 kHz) AF dummy2)SSG output: load Confirm that the output Specified output.6to100qBμis constant from 6 dBto100dB.7. S meter 1) MODE: USB S meterRXVRSZero adjustment.AGC: FAST SettoS meter startingpoint.2) f: 14,525.0 kHzSSGRear~NTT17S-1SSGoutput: 8 dBμ S meter panel Adjust CCW from thepeak.3) SSG output: 30 dBμ VR9 S-94) MODE:FMVR6+40dBSSG output: 30 dBμ8. Squelch1)MODE:FM SPCheck Between 1 and 3AGC: SLOW (Squelch level)SQUELCH: Threshold BUSY indicatorgoes off.2) MODE: USBRXVR5 Point at which noise di-sappears.3) f: 14,525.0 kHz SSG Rear ANT Check The squelch shouldMODE: USBAFVMpanel open at less than20SQUELCH: Threshold Oscillo- dBμ and the BUSYSSG output: 20 dBμ scope indicator shouldAF dummy light.load4) MODE: FM The squelch shouldSQUELCH: Threshold open at less than 0SSG output: 0 dBμ dBμ and the BUSYindicator shouldlight.26